This symmetrical limiter or reaper circuit is based on a zener diode. Voltage drop across common diodes should be considered.
This circuit is suggested by National Semiconductor and with two operational amplifiers an LM833...
ST Microelectronics has, in its line of low voltage drop linear regulators, the KD1084xx (fixed) and...
In this circuit a 12 V lamp or LED blinks with the music signal applied to the input. R depends on...